3. Signal cable connection procedures for connecting Module controller
• Signal cables use DC 5 V. Never connect wires for 400 V. It trips the protective fuse on the PCB.
-Confirm that it is so arranged that 400 V power will not be applied to signal cables.
-Check the resistance of signal cable terminal board before turning power on . If the resistance is 100Ω, or less, a power cable may be
connected to the signal cable terminal board.
• Communication method is based on RS485.
• Connect signal cable to A, B on the terminal board.
• Signal cables has the polarity. Connect them as shown in fig. 30.
• Connect it to the terminal board using M3.5 crimp terminal as shown in the sketch below.
• Use an adequate screwdriver to tighten terminal screws. If it is tightened too much, it could destroy screws. For the tightening torque of
screw, see the table below.
7 mm or less
Rotary switch setting (SW1:0, SW2:1) on interface board
is “01” from factory sipping. This is slave address number.
Set dip switch SW3-4 of interface board to ON.
Signal cable fixing band
-Fix the signal cable with care to protect the connection to the terminal board from
external force.
-Give an adequate allowance to the signal cable before fixing.
Interface board
Tightening torque (N·m)
M3.5
Power cable/signal cable terminal board
0.68 ~ 0.82
Fig. 30
Fig. 31
5. System design recommendations
43
AB408540130380en-000102
© Danfoss | Climate Solutions | 2023.02
Application Guidelines
